Determination of vanillin by using gold nanoparticle-modified screen-printed carbon electrode modified with graphene quantum dots and Nafion

A voltammetric analytical assay for the selective quantification of vanillin is described. It is based on the use of a gold nanoparticle-modified screen-printed carbon electrode (SPCE) modified with graphene quantum dots (GQD) in a Nafion matrix. The GQD were synthesized by an acidic thermal method...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2018-03, Vol.185 (3), p.204-8, Article 204
Main Authors: Durán, Gema M., Llorent-Martínez, Eulogio J., Contento, Ana M., Ríos, Ángel
Format: Article
Language:English
Subjects:
Analytical Chemistry
Assaying
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Electrodes
Fluorine compounds
Fourier transforms
Gold
Graphene
Graphite
Mathematical analysis
Microengineering
Nanochemistry
Nanoparticles
Nanotechnology
Original Paper
Photoluminescence
Quantum dots
Vanillin
Voltammetry
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Summary:A voltammetric analytical assay for the selective quantification of vanillin is described. It is based on the use of a gold nanoparticle-modified screen-printed carbon electrode (SPCE) modified with graphene quantum dots (GQD) in a Nafion matrix. The GQD were synthesized by an acidic thermal method and characterized by UV-Vis, photoluminescence, and FTIR spectroscopy. The modified SPCE displays a strongly enhanced response to vanillin. Linear sweep voltammetry (LSV) and differential pulse voltammetry (DPV) were applied to optimize the methods. The analytical assay has linear responses in the 13 to 660 μM and 0.66 to 33 μM vanillin concentration ranges. The detection limits are 3.9 μM and 0.32 μM when using LSV and DPV, respectively. The analytical assay is selective and stable. It was applied to the determination of vanillin in several food samples with satisfactory results. Recoveries from spiked samples ranged between 92.1 and 113.0%. Graphical abstract The selective and sensitive quantification of vanillin is carried out by the use of a gold nanoparticle-modified screen-printed carbon electrode modified with graphene quantum dots in a Nafion matrix.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-018-2738-1